“And then from there I heard just screams — muffled screams,” stylist Gennaro DeMarco recalled to jurors of the March, 2011 slaying at the D’Galina’s Center between Seventh Ave. and Broadway.

Michael Kenny at his arraignment in March, 2011. (Steven Hirsch)

Michael Kenny, 42, of Rockaway Park, Queens, deserves a break for mentally “snapping” over his wife’s infidelities, and should be convicted only of manslaughter, defense lawyer Kevin Canfield argued as the trial began with opening statements.

The husband lost his mind after his wife sent a topless photo of herself to his cell phone — later admitting that the intended recipient had been her ex-husband in Trinidad, the lawyer told jurors.

But prosecutor Linda Ford told jurors in her own opening statements that the husband came to the salon prepared for revenge — bringing a six-inch kitchen knife — and rifled the cash register before fleeing.

Kenny has a long history of robberies, violence, and drug issues. Testimony continues Wednesday.